Ok, I think I've decided. I'm going to go the tamron 35-80 2.8-3.5 QZ-35M, which is the predecessor to the adaptall sp tamron 35-80 01a. For those curious, you can find out more about the lens
here. Interestingly, just found a review on the database too. Only one review. Guess that's as good as any reason to test it out some more?
https://www.pentaxforums.com/userreviews/tamron-adaptall-35-80mm-f2-8-3-5-qz-35m.html
I took it out the other day and it's been sitting on my shelf looking at me, and I'm getting excited at the thought of what images it's going to make me.
It will also help me decide whether it will stay in my arsenal (i'm hoping not. as in, look, i've spent a month on you and i can feel justified about letting you go now), because I already own the 01a, and really... do I need two of the same? I mean, REALLY??? =P